Stabilizer operations are at the heart of quantum error correction and are typically implemented in software-controlled entangling gates and measurements of groups of qubits. Alternatively, qubits can be designed so that the Hamiltonian corresponds directly to a stabilizer for protecting quantum information. We demonstrate such a hardware implementation of stabilizers in a superconducting circuit composed of chains of π-periodic Josephson elements. With local on-chip flux- and charge-biasing, we observe a softening of the energy band dispersion with respect to flux that is exponential in the number of frustrated plaquette elements, in close agreement with our numerical modeling.
@article{arxiv.2303.00625,
title = {Hardware implementation of quantum stabilizers in superconducting circuits},
author = {K. Dodge and Y. Liu and A. R. Klots and B. Cole and A. Shearrow and M. Senatore and S. Zhu and L. B. Ioffe and R. McDermott and B. L. T. Plourde},
journal= {arXiv preprint arXiv:2303.00625},
year = {2023}
}
Comments
6+30 pages, 4+18 figures, 0+6 tables, published version